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2kW FM Transmitter Stereo DDS with RDS and Audio Processing
- 2000 WATTS RF OUTPUT
- STEREO WITH AUDIO PROCESSING
- DYNAMIC RDS OPTION
- 48VDC or 90-260VAC OPTION
- USB 192 KHz 24 bit OPTION
- INCLUDES SHIPPING
- 5 YEAR WARRANTY
- EXCEEDS CE/FCC TECHNICAL SPEC.
- MODULAR 1kW + 1kW LDMOS DESIGN
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LIMITED WARRANTY |
2000W (2kW) FM Transmitter: Modular LDMOS Design for Regional Broadcasting
The Aareff 2kW system is a fully modular FM solution engineered for maximum air-time reliability. By combining two 1kW LDMOS amplifier blocks with a high-precision Wilkinson splitter and combiner, this system ensures that even during routine maintenance on one module, your station stays on air at half-power. Designed to exceed FCC and EU ETSI technical specifications, it is the professional choice for high-fidelity regional coverage.
Stereo, RDS, and Audio Processing Version: The Ultimate All-in-One FM Broadcast Solution
Optimal Performance & Compliance: Why Choose This Version?
If you're seeking a transmitter that balances powerful broadcasting with strict legal compliance, this version is your definitive choice. It eliminates complexity for both new and experienced broadcasters.
• Beginner-Ready: The unit features automatic audio level adjustment, ensuring your 2000 watt transmitter always adheres to state regulator specifications. Start broadcasting legally and effortlessly.
• Professional-Grade: Ideal for experienced users who prioritize efficiency. It includes everything in one single enclosure, minimizing setup time and cable clutter.
Intelligent Audio Processing for Maximum Reach
Our internal audio processors are engineered to give you a competitive edge:
• The processing keeps the audio level LOUD—allowing your station to compete effectively with others on the dial.
• Crucially, it prevents over deviation, ensuring your powerful signal remains legal and compliant with all permit requirements.
• This version perfectly executes the delicate balance of maximum loudness while maintaining a legal signal.
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The audio inputs industry standard 600 ohm +4 dBu balanced using XLR connectors.
In addition, this version INCLUDES RDS. This allows everybody to see your station name and more scrolling across the car radio display.
The RDS is not just ordinary RDS, it is fully programmable dynamic RDS. This means the transmitter can be connected to a PC by a USB cable. The RDS can be changed on the fly in real time by using USB PC CONTROL shown below.
Flat 30Hz to 76KHz MPX Input Version: Precision for High-End Audio Processors
Professional-Grade Raw MPX Input
This version is specifically available for experienced users who require a straight, raw MPX input for external signal processing.
1. Zero Tilt for Multiband Processors
• The absolute requirement for professional processing is a flat low-frequency response. As proven by our 160Hz Square Wave Test, our input delivers a perfectly square wave with zero tilting. This allows your external processor to maintain absolute control over the modulation, ensuring maximum loudness and a legal signal without low-end artifacts.
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2. Ultra-Stable Hartley VCO & Slow-PLL Architecture
Superior performance starts with a stable foundation. Our Hartley-based, lightly coupled push-pull VCO is so stable it stays within 10kHz of its frequency even with the PLL turned off. This inherent stability leads to two critical performance benefits:
• Ultra-Low Noise: Because the VCO is naturally stable, the PLL only needs to make microscopic corrections (less than 300Hz), resulting in an exceptionally clean and transparent noise floor.
• Preserved Low-End: By heavily low-pass filtering the PLL control voltage to just a few Hz, we ensure 30Hz bass notes pass through the varicap completely unaltered. This preserves the essential low-frequency response demanded by high-performance audio processors.
Result: This preserves the essential low-end audio response demanded by high-performance audio processors.
Which Version Do You Need?
Selecting the Optimal Version for Your Broadcast Requirements.
Choosing the correct version of your FM Transmitter is crucial for operational efficiency and meeting your specific broadcast goals. We offer professionally engineered systems that cover 90% of customer requirements right out of the box, ensuring you get the exact functionality needed for your station.
These are the two primary, professional versions of our FM Transmitters:
| Transmitter Version | Ideal Application |
|---|---|
| ◼ Stereo with RDS and Audio Processing Version | Any station prioritizing high audio quality, professional stereo separation, and dynamic Radio Data System (RDS) functionality for displaying station name, song titles, or slogans. This is the most feature-rich option for modern, professional broadcasting. |
| ◼ MPX Version | Experienced engineers who handle external audio processing and stereo encoding outside the transmitter. This version accepts a pre-processed and encoded composite signal (MPX) for direct modulation, offering maximum control to the audio chain expert. |
Need Customization?
We understand that custom requirements exist. If you need alternative versions (e.g., stereo only, no RDS, no processing), we can accommodate these requests to match your specific technical setup.
You will find detailed descriptions of both the Stereo/RDS and MPX versions, including how they work, technical specifications, and the final price INCLUDING delivery to your country, in the following sections.
Contact Our Experts
If you are still unsure, you are always welcome to contact us at: info@aareff.com or ws: +1 829 6980733 and we're more than happy to advise you.
Web Based Audio, Control and Monitoring (OPTION)
Stay connected to your transmitter anywhere, anytime. With AAREFF’s web based remote control and monitoring option, you can monitor and manage critical performance data in real time without needing to travel to site.
- Web Interface & Secure Login – access your transmitter from any browser
- Real-Time Monitoring – forward/reflected power, VSWR, temperature, and supply voltage
- Remote Control Functions – switch RF on/off, adjust power levels, change and fine tune the frequency
- Flexible Connectivity – connect easily via LAN, VPN, or our secure web interface — designed to work even behind firewalls.
This feature not only gives engineers the tools they need, but also provides peace of mind for station managers by reducing downtime, lowering maintenance costs, and ensuring your broadcast runs smoothly 24/7.
THE INTERFACE SHOWN BELOW IS A REAL LIVE!! TRANSMITTER, ONLINE NOW, IN OUR WORKSHOP
> PRESS < the RED speaker icon, wait 4 secs and you will hear the real-time sound being fed to the transmitters audio input section. It will work on mobile, but it looks better on desktop as its designed to be on view in the studio computer.
What You See in the Remote Dashboard
The AAREFF remote control interface provides engineers with a complete overview of transmitter and system status in real time:
- Connection & Device Info – online/offline status, LAN & external IP, device ID
- System Performance – CPU load, processor type, disk usage, memory load, lock status
- Operating Conditions – internal temperature, supply voltages, calibration states
- Transmitter Parameters – frequency, forward power, VSWR, phase voltage, DDS/PLL control
- Real-Time Alarms – instant alerts when parameters go out of range
From anywhere in the world, you can securely monitor, troubleshoot, and control your AAREFF / Veronica FM transmitter, ensuring maximum uptime and peace of mind.
Internal Microprocessor Logging
Every AAREFF / Veronica transmitter is supervised by an embedded microprocessor that continuously records system activity. The internal log provides engineers with precise, time-stamped updates of operating conditions and broadcast data.
- Time-Stamped Events – detailed logs of all changes and updates
- Operating State – PLL lock status, frequency, RF power output
- Live Parameters – phase voltage, VCO levels, calibration values, DDS registers
- Device Information – unique transmitter ID and system identifiers
- Configuration Updates – records frequency adjustments and parameter changes
- RDS Activity – logs text messages, program IDs (PI), PTY codes, and 57kHz carrier status
- Diagnostic Data – low-level register outputs for troubleshooting
This level of transparency ensures engineers can track performance, confirm settings, and diagnose issues quickly whether on site or connected remotely.
Web-Based Control Panel
The AAREFF remote interface allows engineers to configure transmitter and RDS settings directly from any browser, providing complete flexibility and instant control.
- Frequency & Power – set operating frequency and adjust RF output remotely
- DDS Calibration – fine-tune digital synthesis for precise operation
- RDS Text – edit scrolling station messages in real time
- Program Identification – configure PI codes and PTY types
- RDS Carrier Control – switch the 57 kHz subcarrier on or off instantly
- Service Commands – enter advanced commands for maintenance
With this secure, web-based control panel, you can manage your transmitter and RDS data from anywhere in the world.
Antennas
The transmitter will work with any 50 ohm antenna rated at 2000W or higher. The following antennas when used with this 2kW transmitter will radiate (EIRP) the approximate power shown.
• Vertical 5/8 Wave 5kW EIRP
• Circular Dipole up to 10kW EIRP
• Folded Dipole up to 25kW EIRP
Our 25kW EIRP system includes this transmitter packaged in with coaxial cable and a suitable antenna system. These full systems are engineered to comply with the EU standards and regulations for licensed broadcasting and most other countries regulations in the world.
Temperature Protection
The 2kW transmitter package uses two large amplifiers enclosures which spread the waste heat over a larger area. Spreading the heat this way improves long term reliability over compact type models simply because there are no concentrated hot spots which always lead to faster failure. This generally doubles the lifetime reliability over the equivalent compact type model. In addition to this there is active temperature monitoring which in worse case scenario will reduce the power automatically to protect the unit if the ambient temperature is extreme at over +40C.
VSWR Protection
The final output stage of the 2kW transmitter utilizes twin BLP188XNRFE LDMOS amplifiers, specifically chosen for their extreme ruggedness. These XR (Extremely Rugged) devices are designed to withstand severe load mismatches at VSWRs greater than 65:1 at 5 dB of compression. For ultimate reliability, the system is engineered to remain stable and protected even under the most challenging antenna environments.
Construction
The complete assembly is made up of two 3U enclosures and one 2U enclosure in strong 16-gauge steel, powder coated and baked in satin black. This is military grade strength, not flimsy thin paneling that eastern countries make. The whole thing tough with a durable surface that will never rust and will shine for years. The front panels are 19 inches so they will fit with ease into a standard rack.
Configuration
Plug-and-Play Setup
We ensure your FM Transmitter is ready for immediate use upon arrival.
To facilitate a true plug-and-play experience, we factory-test and pre-set the unit to your desired FM broadcast frequency. This means you can connect the transmitter and begin broadcasting straight out of the box after delivery.
Flexible On-Site Adjustmentsp
If your intended operating frequency changes, or if you don't specify it during the order, adjustments are quick and straightforward. The following parameters are easily user-adjustable in minutes via the underside panel controls:
• Operating Frequency (FM Channel)
• FM Deviation (Modulation depth)
• Output Power Level (Fine-tuning the 1W output)
This design guarantees maximum flexibility and simple on-site configuration for any broadcasting requirement.More information on this in the User Manual, you can find a link to this below.
Compliance
The stereo version with audio processing and limiting meets all the regulatory standards required out of the box and pre configured. In fact if you send us a copy of your permit and it's conditions, we will set it up exactly to the specification. This equipment complies with EU/CE harmonised standards and FCC technical requirements for FM broadcasting. More information HERE
RF Specification
All stated measurements were made at 220VAC at 27 Deg. Celsius ambient temperature unless stated.
| Power Output | Adj. 1-2000 Watts into 50 ohms |
| Spurious Emissions | Less than -75 dB ref to carrier |
| Harmonic Emissions | Less than -70 dB ref to carrier |
| Freq Stability | +/- 1 KHz max. typ. +/-300 Hz |
| Deviation Sensitivity Stability | +/-2 % max |
| Freq Fine Adj | > +/- 1000 Hz |
| Freq Range | 87.5 to 108 MHz in 100 KHz steps |
| Out of Lock RF Muting | Less than -70 dB ref to carrier |
| Residual AM | Less than 0.5 % |
| Synchronous AM | Less than 0.5 % |
| RF Ruggedness | Any VSWR phase or length of time |
| Output Connector | DIN 7-16 |
| Operating Temp | -20 to +40 Deg C |
AF Specification
| Pre-emphasis | (50 uS/ 75 uS/ None) Selectable | |
| Audio Input Connector | XLR True Balanced 600 ohm No Ground Ref./ Floating | |
| Audio Input Sensitivity | +4 dBu for +/- 75 KHz dev. | |
| Version | MPX | Stereo and Audio Processor |
| Signal To Noise Ratio | 80dB | 65dB |
| Frequency Response | 30Hz-76KHz | 30Hz-15KHz |
| Audio Distortion | Better than 0.1% / 60dB THD | Better than 0.1% / 60dB THD |
AC Specification
| Input Voltage | 90-264 V AC 135-370 V DC 47-63 Hz |
| Input Power | 3000W for 2000W RF OUT with RF SWR less than 1.5 |
| Working Humidity | 20-90% RH non-condensing |
| Safety Standards | UL60950-1 TUV EN60950-1 BSMI CNS14336 CCC GB4943 J60950-1 approved |
| EMC Emission | Compliance to EN55022 class B EN61000-3-2 3 FCC PART 15 / CISPR22 class B CNS13438 class B GB17625.1 |
| EMC Immunity | Compliance to EN61000-4-2 3 4 5 6 8 11 light industry level criteria A |
